/* ---- 响应式 ---- */
@media (max-width: 900px) {
  .link-row { grid-template-columns: 1fr 1fr; }
  .link-row-head { display: none; }
  .mynav-add-grid { grid-template-columns: 1fr 1fr; }
  .mynav-add-btn { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .mynav-add-grid { grid-template-columns: 1fr; }
  .mynav-modal-grid { grid-template-columns: 1fr; }
}